GRAS 43BB-1 低噪音耳模拟器系统
Volume: 1260 mm³ @ 500 Hz
Dyn range: 10.5 dB(A) to 113 dB
Based on IEC 60318-4
43BB-1 低噪声耳模拟器系统用于插入式耳机的低噪声声学测量，特别是带主动降噪功能的耳机。它基于 IEC 60318-4 耳模拟器标准。
Technology
Introduction
The GRAS 43BB-1 is a low-noise, high-sensitive ear simulator system for measurements of sound pressure levels close to or below the threshold of human hearing.
It is identical to the 43BB Low-noise Ear Simulator System except that it uses an angled adapter for the preamplifier, and therefore can be used in binaural setups inside a 45BB KEMAR or a 45BC.
43BB-1 is part of the 45BB-12 KEMAR with Anthropometric Pinna for Low-noise Ear- and Headphone Test 2-Ch LEMO, and 45BC-12 KEMAR with Mouth Simulator and Anthropometric Pinnae for Low-noise Headset Test, 2-Ch LEMO.
Read about the 43BB here.
Specifications
Noise floor and frequency response for 43BB-1 is identical to the 43BB:
The noise floor (solid line) is typically below the threshold of human hearing (dashed line).
The frequency response is very similar to the standard 60318-4 ear simulator up to 10 kHz
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.
Ordering info
Included Items
| GRAS RA0234 | Low-noise Ear Simulator |
| GRAS 40AH | 1/2" Ext. Polarized Pressure Microphone, High Sensitivity |
| GRAS 26HG | 1/4" Preamplifier with 3 m Integrated Cable |
| GRAS 26HT | Gain and Filter Unit for 40HT |
| GRAS 12HF | 1-Channel Power Module for Low-noise Systems |
Accessories
| GRAS 42AA | Pistonphone, Class 1 |
| GRAS 42AP | Intelligent Pistonphone, Class 0 |
| GRAS RA0090 | 94 dB Pistonphone Coupler |
GRAS RA0237 | Straight Ear Canal Extension Kit for KEMAR |
| GRAS RA0172 | Pinna Holder Kit |
| GRAS AA0046 | 3 m LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system |
| GRAS AA0047 | 10 m LEMO 7-pin - LEMO 7-pin Cable for Low-noise measuring system |
GRAS Sound & Vibration reserves the right to change accessories and specifications without notice.
